Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
  • C07C227/38—Separation; Purification; Stabilisation; Use of additives
  • C07C227/40—Separation; Purification
  • C07C227/42—Crystallisation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J19/26—Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
  • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
  • B01J2/06—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a liquid medium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
  • B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
  • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D11/00—Special methods for preparing compositions containing mixtures of detergents
  • C11D11/0082—Special methods for preparing compositions containing mixtures of detergents one or more of the detergent ingredients being in a liquefied state, e.g. slurry, paste or melt, and the process resulting in solid detergent particles such as granules, powders or beads
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/26—Organic compounds containing nitrogen
  • C11D3/33—Amino carboxylic acids

Definitions

• the invention relates to a process for producing a granulate containing one or more complexing agent salts of the general formula I.
• aminopolyphosphonates, polycarboxylates or aminopolycarboxylates such as ethylenediaminetetraacetic acid (EDTA), which are frequently used as complexing agents, for example in detergents and cleaners, are only slightly biodegradable.
• EDTA ethylenediaminetetraacetic acid
• glycine-N, N-diacetic acid derivatives such as methylglycine-N, N-diacetic acid (MGDA) and its salts - e.g. the trialkali metal salts - which have beneficial toxicological properties and are readily biodegradable.
• MGDA methylglycine-N, N-diacetic acid
• salts e.g. the trialkali metal salts - which have beneficial toxicological properties and are readily biodegradable.
• the use of MGDA and related glycine-N, N-diacetic acid derivatives in detergents and their syntheses are e.g. in WO-A 94/029421 or US 5,849,950.
• For a cost-effective production of glycine-N, N-diacetic acid derivatives high demands are placed on the yield of the individual synthesis steps and purity of the isolated intermediates.
• MGDA is prepared in particular by reaction of iminodiacetonetril with acetaldehyde and hydrocyanic acid or of alpha-alanine nitrile with formaldehyde and hydrocyanic acid and alkaline hydrolysis of the intermediate methylglycinediacetontrile (MGDN) with sodium hydroxide solution, the trisodium salt of the MGDA being obtained.
• MGDN is generally isolated as an intermediate and used as a pure substance in the subsequent hydrolysis step.
• Complexing agent salts are often desired in coarse-grained form, because this is associated with many advantages, in particular with improved flow behavior, easier handling and improved meterability.
• a particularly advantageous process for producing coarse-grained products is the granulation in a special fluidized bed, the so-called spouted bed, also known as fluidized-bed spray granulation.
• the method is, for example, the subject of the diploma thesis of A. Werner: Wrbel layer spray granulation: process optimization in the spouted bed, September 2009, BASF SE and University of Stuttgart, Institute of Mechanical Process Engineering.
• the corresponding apparatuses are frequently referred to in the specialist and patent literature as spouted bed apparatus and are described, for example, in DE 10 2005 037 630, DE 10 162 781 or DE 103 22 062.
• the object of the invention was to provide a process for the preparation of granules of one or more complexing agent salts with improved space-time yield and improved product quality, in particular with a more compact, more uniform particle shape and with variables derived therefrom, in particular higher bulk density, lower fracture sensitivity and better flowability To make available.
• the object is achieved by a process for producing a granulate containing one or more complexing agent salts of the general formula
• n and m are each an integer from 0 to 5 and
• R '" is hydrogen or a C 1 -C 12 -alkyl radical or a C 2 -C 12 -alkenyl radical, which may additionally be substituted by up to 5 hydroxyl groups, or one of the groupings
• o and p are each an integer from 0 to 5
• M is independently of one another hydrogen, alkali metal, alkaline earth metal, ammonium or substituted ammonium in the corresponding stoichiometric amounts
• a jet apparatus in which a directed from bottom to top, centrally or one or more, positioned in the region of the central axis of the jet apparatus gaseous driving jet induce an internal loop movement, to form a jet zone, at the upper end of which a fountain zone connects, in a Return zone in the wall region of the jet apparatus passes, which merges again, in its lower part, in the jet zone, where the aqueous starting solution is injected into the one or more gaseous blowing jet and thereby dried to obtain the granules, which is discharged from the jet apparatus.
• the defined flow profile in the jet apparatus causes the forming granules to regularly pass the one or more nozzles via which the aqueous starting solution is sprayed, so that spraying is carried out regularly, at clearly defined time intervals. with the result that it comes to the regular growth of superimposed layers, in the manner of superimposed onion skins, and thus grow to very uniform particles.
• the granules obtained in this case have excellent product properties, in particular very high, defined bulk density, in the range between 650 and 1000 kg / m 3 , in particular between 760 and 920 kg / m 3 , and a defined, required for the purpose of residual moisture, in the range of about 6 to 14 wt .-% water, in particular 11 to 13 wt .-% water.
• an aqueous solution of one or more complexing agent salts with a concentration in the range of 10 to 80 wt .-%, based on the total weight of the aqueous solution.
• the aqueous starting solution may preferably be preheated to below the boiling point thereof.
• the one or more complexing agent salts correspond to the general formula
• n and m are each an integer from 0 to 5 and
• R '" is hydrogen or a C 1 -C 12 -alkyl radical or a C 2 -C 12 -alkenyl radical, which may additionally be substituted by up to 5 hydroxyl groups, or one of the groupings
• o and p are each an integer from 0 to 5
• M is independently hydrogen, alkali metal, alkaline earth metal, ammonium or substituted ammonium in the corresponding stoichiometric amounts.
• Alkali salts of methylglycine-N, N-diacetic acid are particularly preferred as derivatives of glycine-N, N-diacetic acid.
• aqueous starting solution is sucked into the propulsion jet of a jet apparatus, atomized by the jet and dried to obtain the granules, which is discharged in the upper part of the jet apparatus.
• fluidized-bed spray granulation is a shaping process for producing coarse-grained, monodisperse and almost round particles having particle sizes in the range between 0.3 mm and 30 mm, which are referred to herein as granules, starting from solutions, suspensions or melts.
• the Wrbel layer spray granulation is carried out in what is known as a spout layer, which is a special variant of a Wrbel layer.
• a spout layer which is a special variant of a Wrbel layer.
• particles are fluidized by introducing gas into a perforated bottom with a plurality of perforations (openings) from below Particle is blown collectively, wherein the particles are whirled up.
• the fluidization takes place via one or more few openings at the bottom of the jet apparatus, via which one or more blowing jets are injected.
• the one or more propulsion jets induce an internal, ordered loop motion, which may also be referred to as circular or cylindrical motion, and which comprises substantially three fluidization states or zones, a jet zone, a fountain zone, and a return zone.
• a first zone or jet zone the acceleration of the solid particles takes place under the action of the defined, guided from bottom to top propulsion jet, wherein the particles move in this zone in the flow direction of the propulsion jet. Accordingly, there is a vertical upward flow in the jet zone.
• a subsequent second zone or fountain zone the solid particles change their flow direction, there is a cross flow before.
• the particles enter a third zone or return zone in the wall region of the jet apparatus and there have a downward movement until they again reach the area of the, from the bottom upwards guided jet and in the first zone, the jet zone, again from Driving jet be entrained.
• the particles In the return zone, the particles typically move under the influence of gravity.
• a jet apparatus can preferably be used a cylindrical apparatus which tapers conically in the lower region thereof, by injecting a central propulsion jet from below.
• a propulsion jet apparatus of rectangular cross-section can be used, which tapers in a lower part, and in which in the region of the central axis of the same one or more driving beams from below are positioned upwards.
• a propulsion jet apparatus of rectangular cross-section can be used, which tapers in a lower part, and in which in the region of the central axis of the same one or more driving beams from below are positioned upwards.
• the one or more gaseous propulsion jets are formed from a gas which is under an overpressure in the range of 20 mbar to 1 bar above the pressure in the jet apparatus, which relaxes through an opening in the jet apparatus and thereby forms the gaseous propulsion jet.
• the propulsion jet is formed from a gas stream, which is preferably an inert gas, in particular air.
• crystalline particulate matter having a mean particle diameter in the range from about 1 to 100 ⁇ m, preferably from about 1 to 20 ⁇ m is added to the jet apparatus at a location separate from the aqueous starting solution , which is different from the point at which the aqueous starting solution is injected.
• the crystalline fine dust contains the same or the same complexing agent salts as are contained in the aqueous starting solution, or one or more complexing agent salts which are different therefrom.
• the gas stream forming the propulsion jet has a temperature in the range between 80 and 450 ° C, more preferably between 120 and 240 ° C.
• the temperature in the jet zone, in the fountain zone and in the return zone is preferably in the range between 70 and 150 ° C.
• the residence time in the jet apparatus is preferably between 1 minute and 1 hour, in particular between 10 minutes and 40 minutes.
• the invention also relates to formulations comprising the granules prepared by the process described above or aqueous solutions thereof as complexing agents for alkaline earth metal and heavy metal ions, in the amounts customary therefor, in addition to other conventional constituents of such formulations. These are preferably washing and cleaning agent formulations.
• the invention also relates to the use of the granules produced by the process described above for the production of press agglomerates.
• the press agglomerates are used in solid detergents, which are intended in particular for use in dishwashers.
• Example (according to the invention) A 40% strength aqueous Trilon M® solution (trisodium salt of methylglycine-N, N-diacetic acid) was spray-granulated in a jet apparatus of the type ProCell 5 from Glatt.
• the jet apparatus was operated with a volume flow of 180 NnfVh air of an inlet temperature of 180 ° C as propellant jet.
• 9.5 kg / h of the aqueous solution were sprayed into the lower area of the jet apparatus by means of a two-substance nozzle.
• As atomizing gas while compressed air was used at 8 bar.
• the temperature in the jet apparatus was 80 ° C.
• the granulation fluidized bed was operated with a volume flow of 205 NnfVh air at an inlet temperature of 160 ° C. 5.3 kg / h of the aqueous solution were sprayed with a two-component nozzle into the lower region of the granulating fluidized bed. In this case compressed air with 5 bar was used as sputtering gas. The temperature in the granulating fluidized bed was 100 ° C.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Wood Science & Technology (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Life Sciences & Earth Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Combustion & Propulsion (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Detergent Compositions (AREA)
• Medicinal Preparation (AREA)
• Glanulating (AREA)
• Seasonings (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

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Publications (1)

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Cited By (3)

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Citations (9)

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• 2011
  • 2011-09-21 BR BR112013006404A patent/BR112013006404A2/pt active Search and Examination
  • 2011-09-21 CN CN201180046439.2A patent/CN103124720B/zh active Active
  • 2011-09-21 MX MX2013003581A patent/MX342570B/es active IP Right Grant
  • 2011-09-21 PL PL11758206T patent/PL2621892T3/pl unknown
  • 2011-09-21 EP EP11758206.4A patent/EP2621892B1/de active Active
  • 2011-09-21 WO PCT/EP2011/066376 patent/WO2012041741A1/de active Application Filing
  • 2011-09-21 KR KR1020137006511A patent/KR101897991B1/ko active IP Right Grant
  • 2011-09-21 JP JP2013529639A patent/JP5919278B2/ja active Active
  • 2011-09-21 MY MYPI2013001019A patent/MY160461A/en unknown
  • 2011-09-21 ES ES11758206.4T patent/ES2547417T3/es active Active
  • 2011-09-21 CA CA2809749A patent/CA2809749A1/en not_active Abandoned
  • 2011-09-21 RU RU2013119414/04A patent/RU2573412C2/ru active

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